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Finding the Fourth Proportional to 7,960.62, 10,990.58 and 5,129.00

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Solution

The fourth proportional to 7,960.62, 10,990.58 and 5,129.00 is: 7,081.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,960.62 : 10,990.58 = 5,129.00 : x
  2. Step 2: Convert to fraction form
    7,960.62/10,990.58 = 5,129.00/x
  3. Step 3: Cross multiply
    7,960.62x = 10,990.58 × 5,129.00
  4. Step 4: Simplify right side
    7,960.62x = 56,370,604.22
  5. Step 5: Solve for x
    x = 56,370,604.22/7,960.62
  6. Step 6: Final answer
    x = 7,081.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.